Fix support of cgroup

:Release Notes:
Change path to cgroup CPU subsytem to /sys/fs/cgroup/cpuset

:Detailed Notes:

:Testing Performed:
Compiled and tested locally.

:QA Notes:
This commit must be commited after https://gpro.palm.com/#/c/20177/

:Issues Addressed:
[GF-45111] ActivityManager doesn't work without cgroups

Open-webOS-DCO-1.0-Signed-off-by: Maksym Sditanov <maxim.sditanov@lge.com>

Change-Id: I5924072f719a82078207bde2ff66e17aaf9a5328
Reviewed-on: https://g2g.palm.com/3994
Reviewed-by: DCO Verification
Tested-by: Maksym Sditanov <maxim.sditanov@lge.com>
Reviewed-by: Igor Kuksyuk <igor.kuksiuk@lge.com>
Reviewed-by: Maksym Sditanov <maxim.sditanov@lge.com>